局部放电联合检测中光-电信号与放电量关联关系的修正
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摘要
基于实验室搭建的局部放电光-电信号联合检测平台,进行了4种典型缺陷下局放模拟检测实验,获取了局放的光信号和电信号。分析了两类局部放电信号与SF6气体绝缘模拟腔体内部的视在放电量之间的关系,同时,根据现场试验中,真实存在的一些影响因素对结果进行了修正,分别从不同气压下超高频(ultra high frequency,UHF)检测信号与视在放电量之间的关系和不同尺寸绝缘缺陷下光测法信号与视在放电量之间的关系两方面进行了修正。获取了气压对UHF信号影响的修正公式,取模拟腔体内气压0.3 MPa时,对修正值与实际测量值进行比较,得到除自由金属微粒缺陷(相对误差为14. 4%)外,其他缺陷的相对误差均小于5%;获取了不同缺陷尺寸下对光测法信号影响的修正公式,选取各类缺陷的最小尺寸,对修正值与实测值进行比较发现,除自由金属微粒缺陷外,其他缺陷的相对误差均小于10%,验证了修正结果的可靠性。
Based on the partial discharge( PD) combined detection platform in the laboratory,the experiments under the four typical defects are performed,and the PD optical signals and PD electrical signals are obtained. The relationship between the two types of PD signals and the charge quantity in the SF6 insulated simulation cavity is analyzed. According to the actual influence factors in the field test,the results were corrected. The relationship between ultra high frequency( UHF) signal and charge quantity under different pressures are revised,the relationship between optical method and charge quantity under different size of insulation defects are also revised. A correction formula for the effect of air pressure on the UHF signal is obtained. When the pressure in the simulation cavity is 0. 3 MPa,the correction value is compared with the measured value. Except for the free metal particle defect( relative error is 14. 4%),the relative error of other defects is less than 5%. A correction formula for the effect of different defect sizes on the optical signal is obtained,and the minimum size of each type of defect is selected to calculate the correction value. Comparing with the measured values,it is found that the relative errors of other defects except the free metal particle defects are less than 10%,which verifies the reliability of the correction result.
Based on the partial discharge( PD) combined detection platform in the laboratory,the experiments under the four typical defects are performed,and the PD optical signals and PD electrical signals are obtained. The relationship between the two types of PD signals and the charge quantity in the SF6 insulated simulation cavity is analyzed. According to the actual influence factors in the field test,the results were corrected. The relationship between ultra high frequency( UHF) signal and charge quantity under different pressures are revised,the relationship between optical method and charge quantity under different size of insulation defects are also revised. A correction formula for the effect of air pressure on the UHF signal is obtained. When the pressure in the simulation cavity is 0. 3 MPa,the correction value is compared with the measured value. Except for the free metal particle defect( relative error is 14. 4%),the relative error of other defects is less than 5%. A correction formula for the effect of different defect sizes on the optical signal is obtained,and the minimum size of each type of defect is selected to calculate the correction value. Comparing with the measured values,it is found that the relative errors of other defects except the free metal particle defects are less than 10%,which verifies the reliability of the correction result.
引文
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12 Lundgarrd L E,Runde M,Skyberg B. Acoustic diagnosis of gas insulated substations:A theoretical and experimental basis[J]. IEEE Transactions on Dielectrics and Electrical Insulation,1990,5(4):1751-1758
2 Judd M D,Farish O,Hampton B F. The excitation of UHF signals by partial discharges in GIS[J]. Insulation IEEE Transactions on Dielectrics&Electrical,1996,3(2):213-228
3 Prakash K S,Srivastava K D,Morcos M M. Movement of particles in compressed SF6 GIS with dielectric coated enclosure[J]. IEEE Transactions on Dielectrics&Electrical Insulation,2002,4(3):344-347
4 黄辉,黄凤,李春龙,等.基于特高频无线传感器和模式识别算法的局部放电定位法[J].科学技术与工程,2018,18(4):65-70Huang Hui,Huang Feng,Li Chunlong,et al. Partial discharge localization methodology based on ultra high frequency wireless sensor and pattern recognition algorithm[J]. Science Technology and Engineering,2018,18(4):65-70
5 施景垒,宋云翔,杨景刚,等.一起252 kV组合电器局放异常信号分析处理[J].电力工程技术,2017,36(6):127-131Shi Jinglei,Song Yunxiang,Yang Jinggang,et al. Analysis and treatment of partial discharge abnormal signal in 252 k V GIS equipment[J]. Electric Power Engineering Technology,2017,36(6):127-131
6 赵科,王静君,刘通,等.直流GIL绝缘设计及局部放电检测研究进展[J].电力工程技术,2017,36(5):98-102Zhao Ke,Wang Jingjun,Liu Tong,et al. A review of insulation design and partial discharge detection of DC gas insulated line[J].Electric Power Engineering Technology,2017,36(5):98-102
7 卓然.气体绝缘电器局部放电联合检测的特征优化与故障诊断技术[D].重庆:重庆大学,2014Zhuo Ran. Feature optimization and fault diagnosis of GIS based on combined detection[D]. Chongqing:Chongqing University,2014
8 Mangeret R,Farenc J,Ai B,et al. Optical detection of partial discharge using fluorescent fiber[J]. IEEE Transactions on Electrical Insulation,1991,26(4):783-789
9 Farenc J,Mangeret R,Boulanger A,et al. A fluorescent plastic optical fiber sensor for the detection of corona discharges in high voltage electrical equipment[J]. Review of Scientific Instruments,1994,65(1):155-160
10 司文荣,李军浩,袁鹏,等.局部放电光测法的研究现状与发展[J].高压电器,2008,44(3):261-264Si Wenrong,Li Junhao,Yuan Peng,et al. Current situation and development of optical detection for partial discharge[J]. High Voltage Apparatus,2008,44(33):261-264
11 唐炬,刘永刚,裘吟君,等.针-板电极局部放电光测法信号一次积分值与放电量的关系[J].高电压技术,2012,38(1):1-8Tang Ju,Liu Yonggang,Qiu Yinjun,et al. Relationship between first integral value of signals of the optical method and charge quantity of partial discharge from needle-plate electrode[J]. High Voltage Engineering,2012,38(1):1-8
12 Lundgarrd L E,Runde M,Skyberg B. Acoustic diagnosis of gas insulated substations:A theoretical and experimental basis[J]. IEEE Transactions on Dielectrics and Electrical Insulation,1990,5(4):1751-1758